n - natural
citeste n;
scrie (n%100)/10 + (n%10000)/1000 + + 2*(n%1000)/100
#include <iostream>
using namespace std;
int main(){
unsigned n;
cin >> n;
cout << (n%100)/10 + (n%10000)/1000 + + 2*(n%1000)/100;
}
(n%100)/10 -> Cifra zecilor
(n%10000)/1000 -> Cifra miilor
(n%1000)/100 -> Cifra sutelor
Pe viitor te rog precizeaza limbajul de programare.